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What This Guide Helps With
Addresses centrifuge operation problems caused by loading, cover status, disposable seating, power conditions, obstruction, vibration, or service-level faults.
Step-by-Step Troubleshooting
1. Protect the Patient and Maintain Continuity of Care
Stop reliance on the affected system for active blood processing. Notify the clinical team and establish an alternate blood-management plan before further troubleshooting.
Do not troubleshoot an unstable centrifuge while patient blood processing depends on it.
Expected outcome: Patient care continues safely without dependence on the malfunctioning centrifuge.
2. Confirm the Exact Centrifuge Symptom
Determine whether the centrifuge does not start at all, starts and immediately stops, accelerates slowly, produces unusual noise or vibration, or appears unable to maintain operating speed.
Document any displayed message without assuming its cause.
Expected outcome: The centrifuge failure mode is clearly characterized.
3. Verify Normal Power and Startup
Confirm the system has stable AC power, the power cord is secure, and the equipment starts without unrelated power or startup abnormalities.
Test the outlet with appropriate equipment if power quality is in question.
Expected outcome: The system has stable power and reaches its normal operating state. If power correction restores centrifuge operation, troubleshooting can stop after verification.
4. Confirm Proper Bowl and Processing-Set Installation
Inspect the bowl and disposable set for correct seating, alignment, and tubing routing. Ensure no tubing or disposable component interferes with the centrifuge area.
Do not operate the centrifuge with questionable seating.
Expected outcome: The bowl is seated securely and surrounding components are correctly installed.
5. Verify the Cover Is Fully Closed and Locked
Confirm the cover closes without obstruction and the system recognizes the locked condition.
Do not bypass the cover-lock mechanism.
Expected outcome: The system consistently recognizes the secured cover. If proper cover closure restores centrifuge operation, the issue is resolved.
6. Inspect for External Obstruction or Contamination
With the system powered down as appropriate, inspect accessible centrifuge surroundings for foreign material, dried fluid, damaged disposable components, or anything that could interfere with rotation.
Do not manually force or disassemble internal rotating assemblies.
Expected outcome: The centrifuge area is visibly clear of external obstruction.
7. Try a Known-Good Compatible Disposable
If appropriate, install a new known-good bowl and processing set to rule out deformation or improper disposable fit.
Expected outcome: The known-good disposable loads correctly and the centrifuge operates normally. If so, the original disposable was the likely external cause.
8. Observe a Nonpatient Centrifuge Start
Perform an appropriate operational check and observe startup for abnormal scraping, vibration, hesitation, or repeated stopping.
Stop the test immediately if mechanical noise, excessive vibration, odor, or other unsafe behavior occurs.
Expected outcome: The centrifuge starts and operates smoothly without abnormal mechanical behavior.
9. Verify Stable Operation Through an Appropriate Test Cycle
If the centrifuge starts normally, verify that it remains stable through an appropriate nonpatient functional sequence using manufacturer-approved procedures.
Expected outcome: The centrifuge starts, accelerates, and remains stable without interruption. Troubleshooting can stop if all applicable operational checks pass.
10. Remove From Service if Speed Control Remains Unreliable
If the centrifuge cannot start or operate consistently after external causes are ruled out, remove the Cell Saver Elite+ from service.
Label it Out of Service and send it for qualified bench evaluation.
Expected outcome: An unreliable rotating system is prevented from clinical use.
If the Problem Persists
Power, disposable loading, bowl seating, cover status, obstruction, and obvious external causes have been ruled out. The remaining fault may involve the centrifuge drive, speed sensing, mechanical alignment, control electronics, or another internal service-level condition.
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
- Evaluated using appropriate manufacturer documentation and approved test equipment
- Repaired or configured only by qualified personnel
Complete manufacturer-appropriate operational testing before return to service. Knowing when to stop external troubleshooting is proper troubleshooting.
Clinical Use Tip
Unusual centrifuge noise or vibration is a stop condition; do not continue operating the system in hopes that it will stabilize.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"OR staff reported that the centrifuge started briefly and then stopped before blood processing could begin."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found the processing bowl incompletely seated in the centrifuge area."
Resolution
What action was taken.
Example:
"The bowl was reinstalled correctly with a verified compatible processing set, and the centrifuge completed functional testing without abnormal stopping or vibration."
Helpful Details to Include (If Known)
- Whether centrifuge started at all
- Abnormal sound or vibration
- AC power condition
- Cover-lock status
- Bowl seating
- Processing-set condition
- Known-good disposable test
- System indications
- Functional test result
- Final device status
- Whether centrifuge started at all
- Abnormal sound or vibration
- AC power condition
- Cover-lock status
- Bowl seating
- Processing-set condition
- Known-good disposable test
- System indications
- Functional test result
- Final device status
Final Thought
Centrifuge troubleshooting should progress from safe patient transition to power, disposable seating, cover status, and obstruction checks before internal failure is suspected. Stop when mechanical reliability cannot be demonstrated and document the result clearly.
That is successful troubleshooting.